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Communication dans un congrès

Complex refractive indices in the TeraHertz domain of samples from atmospheric aerosol sources

Jeyan Bichon, Melanie Lavancier, Denis Petitprez, Alexandre Deguine, D. Hourlier-Bahloul, Karine Deboudt, Hervé Herbin, Guillaume Ducournau, Romain Peretti, Sophie Eliet

We report the TeraHertz (THz) characterization of calcium carbonate (CaCO3) particles, one of the major components of desert dust, to determine the real and imaginary parts of their complex refractive indices. The optical characterization is done by TeraHertz Time Domain Spectroscopy (THz-TDS)...

2021 46th International Conference on Infrared, Millimeter and Terahertz Waves (IRMMW-THz), Aug 2021, Chengdu, China. pp.1163, ⟨10.1109/irmmw-thz50926.2021.9566988⟩. ⟨hal-03403999⟩

Communication dans un congrès

Optimized optical cavity for maximal enhancement of terahertz spintronic emission

Pierre Kolejak, Geoffrey Lezier, Kamil Postava, Jean-Francois Lampin, Nicolas Tiercelin, Mathias Vanwolleghem

Spintronic terahertz emitters are recently developed broadband sources for THz applications based on the ultrafast spin-diffusion in ferromagnetic/nonmagnetic ultra-thin multilayers. We present the enhancement of the terahertz emission using the integration of an optimized SiO 2 /TiO 2 photonic...

2021 46th International Conference on Infrared, Millimeter and Terahertz Waves (IRMMW-THz), Aug 2021, Chengdu, China. pp.1-2, ⟨10.1109/IRMMW-THz50926.2021.9566885⟩. ⟨hal-03584675⟩

Communication dans un congrès

New laser lines from a terahertz ammonia laser pumped by a quantum cascadelaser and their application to high-resolution spectroscopy

Jean-Francois Lampin, Marie-Helene Mammez, Dominique Mammez, Thomas Hearne, Zachary Buchanan, Olivier Pirali, Marie-Aline Martin-Drumel, Guillaume Ducournau, Sophie Eliet, Francis Hindle, S Barbieri, Pascale Roy, Gaël Mouret

We present an experimental investigation into new continuous-wave laser lines from a terahertz ammonia laser pumped by a quantum cascade laser. These lines were investigated with the help of a molecular figure of merit calculated from spectroscopic parameters available in molecular databases. We...

2021 46th International Conference on Infrared, Millimeter and Terahertz Waves (IRMMW-THz), Aug 2021, Chengdu, China. pp.1168, ⟨10.1109/IRMMW-THz50926.2021.9566884⟩. ⟨hal-03448763⟩

Communication dans un congrès

Up to 100 Gbit/s short link using 300 GHz band Yagi-Uda antenna

Aritrio Bandyopadhyay, Fabio Pavanello, Emilien Peytavit, Jean-Francois Lampin, Malek Zegaoui, Mohammed Zaknoune, P. Szriftgiser, Guillaume Ducournau

We report on the use of a Yagi-Uda antenna on polymer substrate used for indoor 300 GHz data-link applications. The Yagi-Uda antenna-based data-link is validated for up to QAM-16 signals (100 Gbit/s).

2021 46th International Conference on Infrared, Millimeter and Terahertz Waves (IRMMW-THz), Aug 2021, Chengdu, China. pp.1-2, ⟨10.1109/IRMMW-THz50926.2021.9566991⟩. ⟨hal-03413395⟩

Communication dans un congrès

Finding the accurate permittivity model for liquid water and heavy water at different temperatures in the Terahertz range

Melanie Lavancier, Jean-Francois Lampin, Romain Peretti

We present a study of liquid water and heavy water in the terahertz range at temperatures between 283K and 348K. We will fit our data with the fit@TDS software that provides a criterion to discriminate good models from others. We will present a comparison between the models proposed in the...

2021 46th International Conference on Infrared, Millimeter and Terahertz Waves (IRMMW-THz), Aug 2021, Chengdu, China. pp.1-2, ⟨10.1109/IRMMW-THz50926.2021.9567238⟩. ⟨hal-03584658⟩

Communication dans un congrès

Antennas for a point to multi-point communication system operating in D-band

Giacomo Ulisse, Guillaume Ducournau, Viktor Krozer

Two different antennas were developed for a point to multi-point communication system operating in D-band (110- 170 GHz). The first is a horn antenna with a 20 dB gain and 30° horizontal radiation pattern. The second one is a horn antenna with a focusing dielectric lens that allows to reach a gain...

2021 46th International Conference on Infrared, Millimeter and Terahertz Waves (IRMMW-THz), Aug 2021, Chengdu, China. pp.1-2, ⟨10.1109/IRMMW-THz50926.2021.9566917⟩. ⟨hal-03464858⟩

Communication dans un congrès

Low-Temperature-grown GaAs photoconductors suitable for 1550nm-wavelength illumination

Charbel Tannoury, Maximilien Billet, Christophe Coinon, Jean-Francois Lampin, Emilien Peytavit

In this communication, we show that ultrafast photoconductors based on low-temperature-grown Gallium Arsenide material exhibit photoresponse values reaching 11 mA/W under 1550 nm CW excitation. This is obtained by using an optical microcavity based on a buried metal layer acting as back reflecting...

2021 46th International Conference on Infrared, Millimeter and Terahertz Waves (IRMMW-THz), Aug 2021, Chengdu, China. pp.1-2, ⟨10.1109/IRMMW-THz50926.2021.9567204⟩. ⟨hal-03584631⟩

Communication dans un congrès

[Invited] H2S photoacoustic detection with an integrated THz gas sensor for food quality control

Elias Akiki, Marie-Hélène Mammez, Guillaume Ducournau, Benjamin Walter, Gaël Mouret, Jean-Francois Lampin, Mathias Vanwolleghem

THz photoacoustic (PA) detection of H 2 S gas concentrations on the order of 200 ppm using a Poly-Si membrane as a PA microphone is reported. This result is a first step towards the demonstration of a fully integrated THz PA gas sensor with an expected sensitivity of 10’s of ppb.

46th International Conference on Infrared, Millimeter and Terahertz Waves (IRMMW-THz), Aug 2021, Chengdu, China. pp.1-2, ⟨10.1109/IRMMW-THz50926.2021.9567307⟩. ⟨hal-03465148⟩

Communication dans un congrès

THz s-SNOM imaging of logarithmic spiral antennas

C. Santos, Louis Thomas, Théo Hannotte, Melanie Lavancier, Sophie Eliet, Jean-Francois Lampin, Romain Peretti

Probing the near-field of photonic components at sub-wavelength scale is of high interest to improve the design of future THz devices. We report on the THz near-field imaging of logarithmic spiral antennas by scattering-type scanning near-field optical microscopy (s-SNOM). Our results demonstrate...

2021 46th International Conference on Infrared, Millimeter and Terahertz Waves (IRMMW-THz), Aug 2021, Chengdu, China. pp.1-2, ⟨10.1109/IRMMW-THz50926.2021.9567111⟩. ⟨hal-03467373⟩

Communication dans un congrès

Polarization control of emitted THz waves using spintronic emitters with anisotropic magnetic layers & birefringence characterization of Quartz

Geoffrey Lezier, Pierre Kolejak, Jean-Francois Lampin, Kamil Postava, Mathias Vanwolleghem, Nicolas Tiercelin

We demonstrate that spintronic TeraHertz emitters using uni-axial anisotropic FeCo/TbCo 2 /FeCo ferromagnetic layers allow the polarization control of the THz emitted wave thanks to the Stoner-Wohlfarth coherent rotation of magnetization when submitted to a magnetic field along hard axis. The...

2021 46th International Conference on Infrared, Millimeter and Terahertz Waves (IRMMW-THz), Aug 2021, Chengdu, China. ⟨10.1109/IRMMW-THz50926.2021.9567537⟩. ⟨hal-03584687⟩